Abstract differential geometry
Compositio Mathematica, Volume 4  (1937), p. 308-341
@article{CM_1937__4__308_0,
     author = {Kerner, Michael},
     title = {Abstract differential geometry},
     journal = {Compositio Mathematica},
     publisher = {Johnson Reprint Corporation},
     volume = {4},
     year = {1937},
     pages = {308-341},
     zbl = {0017.02203},
     language = {en},
     url = {http://www.numdam.org/item/CM_1937__4__308_0}
}
Kerner, Michael. Abstract differential geometry. Compositio Mathematica, Volume 4 (1937) , pp. 308-341. http://www.numdam.org/item/CM_1937__4__308_0/